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On the occurrence of gallium and germanium in the Bergslagen ore province, Sweden
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Mineralogy Petrology and Tectonics. Geol Survey Sweden, Dept Mineral Resources, Uppsala, Sweden.
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Mineralogy Petrology and Tectonics.
2019 (English)In: GFF, ISSN 1103-5897, E-ISSN 2000-0863, Vol. 141, no 1, p. 48-53Article in journal (Refereed) Published
Abstract [en]

The presence of the critical and sought-after (semi-)metals gallium (Ga) and germanium (Ge) has previously been reported from mineralisations in the Bergslagen ore province, south central Sweden. Some of these reports were however recently shown to be questionable or erroneous. Here we summarise early analytical work on these metals in mineral deposits of the Bergslagen province, as well as briefly report new analytical data for Ga and Ge from recent, in part on-going work on different mineralisation types. The new data show that the sampled sulphide and iron oxide mineralisations in the Bergslagen province are overall not particularly enriched in Ga, and even less so with regards to Ge. One major exception is the significant Ga enrichment observed in skarn-hosted Fe-REE(-polymetallic) deposits of Bastnas type. Notably, these mineralisations also host increased contents of Ge. Based on this broader suite of sampled deposits, the suggested correlation between Ga and Al contents in previously studied material with relatively increased Ga grades, is in part contradicted, indicating that Ga is only in part sequestered through straightforward Al-substitution into aluminium silicate and oxide minerals. The mineralisations that do exhibit significantly increased Ge contents, in addition to the Bastnas-type deposits, are represented by both sulphide-dominated ones and Fe (-Mn) oxide-rich systems.

Place, publisher, year, edition, pages
TAYLOR & FRANCIS LTD , 2019. Vol. 141, no 1, p. 48-53
Keywords [en]
Gallium, germanium, Bergslagen, mineralisation, Sweden
National Category
Geology
Identifiers
URN: urn:nbn:se:uu:diva-385583DOI: 10.1080/11035897.2018.1525619ISI: 000467182600004OAI: oai:DiVA.org:uu-385583DiVA, id: diva2:1325668
Funder
Swedish Research CouncilAvailable from: 2019-06-17 Created: 2019-06-17 Last updated: 2019-06-17Bibliographically approved

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